It’s fairly likely these differences are as a result of SOLR-2649[1] (released with 5.5) and SOLR-8812[2] (released with 6.1).
If you haven’t seen it, I recommend you read Hoss'ss blog “Why Not AND, OR, And NOT?” <https://lucidworks.com/blog/2011/12/28/why-not-and-or-and-not/>. If you can, add parentheses to explicitly specify precedence. [1] https://issues.apache.org/jira/browse/SOLR-2649 [2] https://issues.apache.org/jira/browse/SOLR-8812 -- Steve www.lucidworks.com > On Aug 4, 2016, at 2:23 AM, Modassar Ather <modather1...@gmail.com> wrote: > > Hi, > > During migration from Solr-5.4.1 to Solr-6.1.0 I saw a difference in the > behavior of few of my boolean queries. > As per my current understanding the default operator comes in when there is > no operator present in between two terms. > Also both the ANDed terms are marked mandatory if not, any of them is > introduced as NOT. Same is the case with OR. > Please correct me if my understanding is wrong. > > The below queries are parsed differently and causes a lot of difference in > search result. > The default operator used is AND and no mm is set. > > > *Query : *fl:(network hardware AND device OR system) > *Solr.6.1.0 :* "+(+fl:network +fl:hardware fl:device fl:system)" > *Solr-5.4.0 : *"+(fl:network +fl:hardware +fl:device fl:system)" > > *Query : *fl:(network OR hardware device system) > *Solr.6.1.0 : *"+(fl:network fl:hardware +fl:device +fl:system)" > *Solr-5.4.0 : *"+(fl:network fl:hardware fl:device fl:system)" > > *Query : *fl:(network OR hardware AND device OR system) > *Solr.6.1.0 : *"+(fl:network +fl:hardware fl:device fl:system)" > *Solr-5.4.0 : *"+(fl:network +fl:hardware +fl:device fl:system)" > > *Query : *fl:(network AND hardware AND device OR system)" > *Solr.6.1.0 : *"+(+fl:network +fl:hardware fl:device fl:system)" > *Solr-5.4.0 : *"+(+fl:network +fl:hardware +fl:device fl:system)" > > Please help me understand the difference in parsing and its effect on > search. > > Thanks, > Modassar
